Being in the psychological field myself, I'm not sure I'd say exactly what diagnosis but it is very clear he has some type of psychological impairment. It was very interesting listening to season two. The mental status of pretty much everyone involved is questionable.
Its clear hes done too many drugs in his lifetime!
I cringed the whole time during his interviews!! way too many drugs ! He makes no sense and is so scattered. He can barely finish a complete thought and is extremely paranoid
I am very confused by a lot of Catfish's narrative in the phone call. He expressed 0 sympathy toward Kristal and her friends/family. Iirc, he even insulted her during the phone call. His voice is shaky throughout the call, he is rambling, and exclusively is concerned with his own innocence. That's his narrative.
Honestly I have bad adhd, bad anxiety, and I like to talk. I think if I was paranoid because I was involved in drugs and covering up criminal activity, then I would probably ramble forever and ever just like Catfish. I think it's a defense strategy.